Rank: 117 based on 652 downloads (last 30 days) and 31 files submitted
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Divakar Roy

E-mail
Company/University
Georgia Institute of Technology
Lat/Long
33.77727, -84.39856

Personal Profile:

Masters Graduate majored in Electrical & Computer Enginering.

My passion for being here on MATLAB Central - This is the very place I have started learning MATLAB from and I love sharing my work and knowing others work. I would like to thank the guys at Mathworks for providing this one big place for everyone to share their knowledge.

I keep myself busy with Problem Solving and Optimizing Solutions in general.

Professional Interests:
Image Processing, Video Processing, GPU Computing, Code Optimization

 

Watch this Author's files

 

Files Posted by Divakar View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
14 Nov 2012 Screenshot IMPIXEL with FIGURE TOOLS IMPIXEL_FIGTOOLS Pixel color values with figure tools on. Author: Divakar Roy impixel, image, gui, pixel, value, select 15 0
12 Nov 2012 Screenshot GINPUT on GUI (Keeping toolbar features on) & Use of custom pointers GUI Framework to use GINPUT (keeping all toolbar features on) + Custom pointers for plots and more. Author: Divakar Roy ginput, gui, mouse, hover, detection, different 45 5
  • 3.5
3.5 | 2 ratings
12 Sep 2012 Screenshot NUMBER SYSTEMS/ BASE CONVERTER Convert a number between different number systems-hex,oct,bin,dec. Author: Divakar Roy symbolic math, convert, change, hex, oct, bin 33 4
  • 3.33333
3.3 | 4 ratings
27 Jun 2011 Screenshot TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy fun, ascii, text, image, convert, show 46 6
  • 4.5
4.5 | 4 ratings
24 Jun 2011 URL2LOCATION Locates the country corresponding to the URL Author: Divakar Roy url, website, internet protocol, location, country, find 10 0
Comments and Ratings by Divakar View all
Updated File Comments Rating
03 Jan 2014 AUTO ENHANCEMENT FOR IMAGES AUTO ENHANCEMENT FOR IMAGES to make better- looking images. Author: Divakar Roy

Wan, my_limit2 and my_limit3 refer to the heuristic limits to be used to change the I and Q respectively of the NTSC converted image to "optimum" levels.

03 Jan 2014 AUTO ENHANCEMENT FOR IMAGES AUTO ENHANCEMENT FOR IMAGES to make better- looking images. Author: Divakar Roy

Shankar, the main aim here is to change the luminance and color profile to the "optimum" levels. To perform those, MATLAB provides built-in functions - RGB2NTSC and NTSC2RGB, so that's why NTSC system is used in the codes.

03 Jan 2014 AUTO CONTRAST Automatic adjustment of contrast of images Author: Divakar Roy

Wan, those are purely heuristic values.

03 Jan 2014 Hide Images In Image Embedding Utility Author: Divakar Roy

Jitha, There was no paper followed for this one, it's entirely home-grown. Refer to my earlier comments in here for the underlying techniques.

10 May 2013 AUTO ENHANCEMENT FOR IMAGES AUTO ENHANCEMENT FOR IMAGES to make better- looking images. Author: Divakar Roy

Shankar -
With heuristic I basically meant, from my experiments those values seemed to give me the "best" results. Again the "best" here is subjective to some extent. There is no other material involved.

Comments and Ratings on Divakar's Files View all
Updated File Comment by Comments Rating
15 Aug 2014 GINPUT on GUI (Keeping toolbar features on) & Use of custom pointers GUI Framework to use GINPUT (keeping all toolbar features on) + Custom pointers for plots and more. Author: Divakar Roy adi

tried it with matlab 2013a as instructed in the example:
[pt1cell,pt2cell] = ginput_gui(img1,[],img2,[]);

got an error....

Error using load
Unable to read file 'ginput_gui.fig':
no such file or directory.

Error in
graphics.internal.figfile.FigFile/read
(line 25)
hgDataVars = load(filename, '-mat',
'-regexp', '^hg[SO]');

Error in
graphics.internal.figfile.FigFile
(line 98)
obj.read(file);

Error in C:\Program
Files\MATLAB\R2013a\toolbox\matlab\graphics\hgload.p>hgload
(line 59)

Error in openfig (line 72)
[fig, savedvisible] =
hgload(filename,
struct('Visible','off'));

Error in gui_mainfcn>local_openfig
(line 286)
gui_hFigure = openfig(name,
singleton, visible);

Error in gui_mainfcn (line 159)
gui_hFigure =
local_openfig(gui_State.gui_Name,
gui_SingletonOpt,
gui_Visible);

Error in ginput_gui (line 122)
gui_mainfcn(gui_State,
varargin{:});

18 Jul 2014 Check Whether a Point Lies Inside,Outside or On a Circle Checks whether a point lies inside,outside or on a circle defined by 3 other points. Author: Divakar Roy jaydeep

i want to find out the N coordinate point in space of 2000 m x 2000m. but constraints is that two co ordinate point are does not intersect within the radius of 200m of each other.
pl. help me for making such program in matlab.

04 Jun 2014 Hide Images In Image Embedding Utility Author: Divakar Roy Govindu, Sowjanya

Hi Divakar!!I am a new user to matlab and i have just tried the code u have given and faceing error in the initial line itself
??? Error: File: hide_image.m Line: 1 Column: 23
Unexpected MATLAB expression.
can u please help me in getting out of this problem and run the code.

02 May 2014 AUTO CONTRAST Automatic adjustment of contrast of images Author: Divakar Roy darkAlert

Good job!
I was looking it is this!
This is algorithm which used in the Preview MAC OS X app!

thx!

16 Mar 2014 Check Whether a Point Lies Inside,Outside or On a Circle Checks whether a point lies inside,outside or on a circle defined by 3 other points. Author: Divakar Roy jeena

hi, i looked for a code to check a point is inside a circle and i found this one. i tried to work on this code. but i didn't understand the 3 points--> (x1,y1),(x2,y2),(x3,y3). pls help me find that.

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